Juha sez, "If you're going to build a protest movement, it might be better to stay off Facebook and Twitter because the cops are fully tuned into social media these days.
The Open Source Intelligence Unit at London's Metropolitan Police Service has a staff of seventeen who work seven days a week - to track social media feed back and to monitor community tension.
Having a sense of humour and understanding of slang gives humans the edge over social media surveillance software, UK cops reckon.
The British cops are worried about 4G mobile broadband though because it'll generate much more data such as video."

The unit monitored some 32 million social media articles during the Olympics, with 10,300 tweets being posted every second during the opening ceremony.

“Companies will tell your that sentiment analysis from a piece of software is about 56 percent accurate … we would say it's lower, because it doesn’t pick up humour or slang,” Ertogral said.

In addition to looking at trends, he said the unit was also exploring association to establish influencers, particularly for protest movements.

“So we’re trying to build friend lists on Facebook, who’s connected to who, who are the influencers out there etc.”

Raytheon's "RIOT" (Rapid Information Overlay Technology) is intended to help governments all over the world by providing a "Google for spies" that mines multiple online sources to build up detailed pictures of the personal activities of their citizens:

The sophisticated technology demonstrates how the same social networks that helped propel the Arab Spring revolutions can be transformed into a "Google for spies" and tapped as a means of monitoring and control.

Using Riot it is possible to gain an entire snapshot of a person's life – their friends, the places they visit charted on a map – in little more than a few clicks of a button.

In the video obtained by the Guardian, it is explained by Raytheon's "principal investigator" Brian Urch that photographs users post on social networks sometimes contain latitude and longitude details – automatically embedded by smartphones within so-called "exif header data."

Riot pulls out this information, showing not only the photographs posted onto social networks by individuals, but also the location at which the photographs were taken.

"We're going to track one of our own employees," Urch says in the video, before bringing up pictures of "Nick," a Raytheon staff member used as an example target. With information gathered from social networks, Riot quickly reveals Nick frequently visits Washington Nationals Park, where on one occasion he snapped a photograph of himself posing with a blonde haired woman.

"We know where Nick's going, we know what Nick looks like," Urch explains, "now we want to try to predict where he may be in the future."

Riot can display on a spider diagram the associations and relationships between individuals online by looking at who they have communicated with over Twitter. It can also mine data from Facebook and sift GPS location information from Foursquare, a mobile phone app used by more than 25 million people to alert friends of their whereabouts. The Foursquare data can be used to display, in graph form, the top 10 places visited by tracked individuals and the times at which they visited them.

The video shows that Nick, who posts his location regularly on Foursquare, visits a gym frequently at 6am early each week. Urch quips: "So if you ever did want to try to get hold of Nick, or maybe get hold of his laptop, you might want to visit the gym at 6am on a Monday."

The associated patent says that Raytheon believes that its software can judge whether its subjects constitute a "security risk"